Network architecture and operations cover how networks are designed, observed, and kept healthy in real environments. This is where theory meets incident response: routing, segmentation, monitoring, and troubleshooting. Example: when users report intermittent failures, you need logs + metrics + packet-level thinking to isolate where packets drop.
References
- RFC 1122: Requirements for Internet Hosts — Communication Layers — the IETF host-layer requirements that define how Internet protocol layers cooperate operationally.
- Network architecture (Wikipedia)